Automatic gas lighting and extinguishing apparatus



(No Model.)`

N. H. su A. B. SHAW. AUTOMATIC GAS LIGHTING AND EXTINGUISHINGAPTAIMATUS;`

"Immun,

UNITED STATES PATENT OFFICE.

NATHANIEL H. SHAV, OF SOMERVILLE, AND AI B. SHAW, OF MEDFORD,MASSACHUSETTS, ASSIGNORS TO THE NE`W ENGLAND AUTOMATIC GAS LIGHTINGCOMPANY, OF PORTLAND, MAINE.

AUTOMATIC GAS LIGHTING AND EXTINGUISHING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 520,836, dated June 5,1894.

t Application filed March 2, 18 91.

T all whom it may concern:

Be it known that we, NATHANIEL H. SHAW, of Somerville, and AI B. SHAW,of Medford, in the county of Middlesex and State of Massachusetts, havejointly invented certain new and useful Improvements in Automatic GasLighting and Extinguishing Apparatus, of which the following, taken inconnection with the accompanying drawings, is a specification.

This invention is in the nature of an improvement upon the apparatus setforth in our Letters Patent No. 405,435, dated June 18, 1880, forautomatic gas lighting and extinguishing apparatus. In such formerinvention a time-mechanism was employed to automatically turn on the gasand to light it from a spark produced by a hammer-stroke upon a chargeof fulminate held in one of a series of pits arranged spirally in theperiphery of a cylindrical carrier, fed upwardly by revolving on ascrew-shaft, the gas being automatically shut off also, at the propertime, by the time-mechanism. IVe employ this apparatus with our presentinvention and combine with it certain novel features designed to givegreater efficiency to the system of lighting referred to. Ve inclose thetime-mechanism in a rigid water-proof case, the upper end of which willenter between the supporting arms of the lantern-frame, while the lowerpart has clamps to secure it to the lamp-post. Within the case, adust-shield protects the mechanism, its key-ways having spring caps tocover them. An arm extending rearwardly from the case and connectingwith the gas-pipe supports the burner and cock. Through this arm thecock-operating shaft extends rearwardly, and a support for the shield orchimney is furnished.

Our invention consists in the devices and combinations of devices hereinset forth, and especially referred to in the appended claims.

In the drawings, Figure l is a vertical section through the case andchimney; Fig. 2 a front elevation showing the door open and the dustguard in position. Fig. 3 is a side elevation with the door closed. Fig.4 is a perspective detail of the door fastening.

A represents the body of the case designed Serial No. 383,457. (Nomodel.)

to receive the time mechanism for actuating the gas-cock and otherlighting apparatus.

B is the door of the case, to which it is connected by hinges C and asuitable clamp fastening D, adapted to draw and hold the door and casein close contact. A packing ring E interposed between them serves tomake the joint water tight.

G is the sheet metal dust-guard, seen in elevation in Fig. 2 andrepresented in Fig. l by the heavy black line. It covers closely thefront of the case A within the door B, so as to entirely conceal thetime mechanism, except the dial H and the hands, and serves to protectthe clock-work from dust or dampness when the door is open. This guardis furnished with an inward turned flange all around, fitting snuglywithin the bottom, top and side walls of the case. Its central portionis raised sufficient-ly to give room for the inclosed mechanism, and yetallow the door B to close. The guard has a large circular opening in itslower portion for the dial, as in Fig. 2, and has other holes through itfor insertion of the key in winding the clock-work, or setting theapparatus. These holes are covered by movable caps J connected to theguard so as to be readily removed and replaced. We prefer to connectthis, as shown, by a light spring K secured at one end to theguard-plate, so that said caps may be sprung to one side beforeinserting the key, and on removing it they will be automaticallyreplaced and held in position.

Vhen it is desired to utilize the time-mechanism as a public clock, thedoor B will be provided with a thick glass panel located directly infront of the dial H.

The drawings represent the preferred form of fastening for the door B.The case A has on its side a solid lug L, 'and the door has acorresponding projection D to which a pail` of links M are pivoted, thefree ends of these links being similarly pivoted to one end of thelocking lever N. This lever is cam-shaped at its pivoted end to engagewith the face of the lug L on the case and draw the door and its packingring E tightly against the rim of the case. The lever is representedwith a slot through it to admit a staple O so that the parts may be heldfast by a padlock. The case is secured to the lamp-post by suitableclamps P, Fig. 3, or by any proper means'.

The upper part of the case has a horizontal arm R, extending rearwardlyto support the gasburner 'inclosed in the chimney S, and also thechimney itself if desired. Said arm is represented as hollow to inclosethe shaft running from the topmost gear in the train of clock-work backto the lighting apparatus and the gas-burner which are to occupy saidchimney, as best shown in the drawings forming part of anotherapplication for patent filed by Ai B. Shaw simultaneously herewith.

We claim as our joint inventionl. The water-proof case A with its doorB, marginal packing ring F and door-fastening devices, and with meansfor securing said case to the lamp-post, in combination with the dustguard G within said case, adapted to cover and protect the time movementand eX- pose the dial, for the purpose set forth.

2. A water-proof case for time-mechanism, and means of securing the sameupon a lamppost, in combination with an arm extending rearwardly fromsaid case to support the burner and cock at the rear end of said arm,for the purpose set forth.

3. A water-proof case for time-mechanism, and means of securing the sameupon a lamppost, in combination with a hollow arm running rearwardlyfrom the upper end of said case to support the burner and cock andinclose the cock-operating shaft of the gaslighting apparatus, andwithaJ close-fitting enlarged chimney adapted to receive the gaspipe andthe sparking apparatus, for the purpose set forth.

In testimony whereof we have signed our names to this specification, inthe presence of two subscribing witnesses, on this 23d day of April, A.D. 1889.

NATHANEL H. SHAV. AI B. SHAW.

Vitnesses:

A. H. SPENCER, Y R. HENRY MARSH.

